diff --git a/docs/reference.md b/docs/reference.md
index 669ddf45..dfe1acaf 100644
--- a/docs/reference.md
+++ b/docs/reference.md
@@ -9,8 +9,9 @@ basic.showNumber(0);
 input.onButtonPressed(Button.A, () => {
     
 });
-led.plot(0, 0);
 music.playTone(0, 0);
+led.plot(0, 0);
+radio.sendNumber(0);
 game.addScore(1);
 images.createImage(`
 . . . . .
diff --git a/docs/reference/logic.md b/docs/reference/logic.md
index 9a81e7ea..2ff4f982 100644
--- a/docs/reference/logic.md
+++ b/docs/reference/logic.md
@@ -1,39 +1,9 @@
 # Logic
 
-[if](/reference/logic/if)
-
-```blocks
-if(true) {
-}
-```
-
-[Boolean](/reference/types/boolean) values: *true*; *false*
-
-```blocks
-true
-false
-```
-
-Boolean binary operators: *and* (conjunction); *or* (disjunction)
-
-```blocks
+```cards
+if(true) {}
+true;
 true && false;
-true || false;
-```
-
-Boolean negation operator
-
-```blocks
-!true
-```
-
-Comparison operators (=, !=, <, >, <=, >=)
-
-```blocks
-0 == 0;
-1 !- 0;
-0 < 1;
-1 > 0;
-0 <= 1;
-1 >= 0;
+!true;
+1 != 0;
 ```
diff --git a/docs/reference/logic/if.md b/docs/reference/logic/if.md
index 824be5ae..48b28778 100644
--- a/docs/reference/logic/if.md
+++ b/docs/reference/logic/if.md
@@ -1,23 +1,26 @@
 # If
 
-Run code based on a condition.
-
 ### @parent blocks/language
  
 
 Conditionally run code depending on whether a [Boolean](/reference/types/boolean) condition is true or false.
 
-### Block Editor
-
-![](/static/mb/hourofcode-0.png)
+```blocks
+if(true) {
+}
+```
 
 In the Block Editor, click on the dark blue gear icon (see above) to add an *else* or *if* to the current block.
 
 ### Example: adjusting screen brightness
 
-![](/static/mb/blocks/game-library/pic0.png)
+```blocks
+if(input.lightLevel()<100){
+    led.setBrightness(255);
+}
+```
 
-If the screen [brightness](/reference/led/brightness) is `< 100`, this code sets the brightness to `255`:
+If the [light level](/input/light-level) is `< 100`, this code sets the brightness to `255`:
 
 ### Lessons
 
diff --git a/docs/reference/loops.md b/docs/reference/loops.md
index b55a6b2f..e436293d 100644
--- a/docs/reference/loops.md
+++ b/docs/reference/loops.md
@@ -1,26 +1,8 @@
 # Loops
 
-Repeat code.
-
-
-[for](/reference/loops/for)
-
-```blocks
+```cards
 for(let i = 0;i<5;i++) {}
-```
-
-[repeat](/reference/loops/repeat)
-
-![](/static/mb/blocks/contents-0.png)
-
-[while](/reference/loops/while)
-
-```blocks
+for(let i = 1;i<5;i++) {}
 while(true) {}
-```
-
-[forever](/reference/basic/forever)
-
-```blocks
 basic.forever(() => {})
 ```
diff --git a/docs/reference/loops/for.md b/docs/reference/loops/for.md
index cc89b948..b8ebe9cd 100644
--- a/docs/reference/loops/for.md
+++ b/docs/reference/loops/for.md
@@ -1,15 +1,13 @@
 # For
 
-Repeat code a preset number of times.
-
 ### @parent blocks/language
  
-
 Repeat code a fixed number of times.
 
-### Block Editor
-
-![](/static/mb/events-0.png)
+```blocks
+for(let i = 0; i < 5; ++i) {
+}
+```
 
 The Block Editor *for* loop is different than the Touch Develop *for* loop in an important way. The above for loop will iterate *five* times, with the loop variable *i* taking on values 0, 1, 2, 3, and 4. The Touch Develop for loop shown below will iterate four times:
 
diff --git a/docs/reference/loops/repeat.md b/docs/reference/loops/repeat.md
index 7706e6af..a15a1893 100644
--- a/docs/reference/loops/repeat.md
+++ b/docs/reference/loops/repeat.md
@@ -2,8 +2,6 @@
 
 Repeat code a preset number of times.
 
-Repeat code a fixed number of times.
-
 ### Block Editor
 
 ![](/static/mb/blocks/contents-0.png)
diff --git a/docs/reference/loops/while.md b/docs/reference/loops/while.md
index 480ad647..e3e98159 100644
--- a/docs/reference/loops/while.md
+++ b/docs/reference/loops/while.md
@@ -1,23 +1,14 @@
 # While
 
-Repeat code in a loop while a condition is true.
-
 ### @parent blocks/language
  
 
 Repeat code while a [Boolean](/reference/types/boolean) `condition` is true.
 
-### ~hide
-
+```blocks
+while(true) {
+}
 ```
-let condition = false
-```
-
-### ~
-
-### Block Editor
-
-![](/static/mb/string-0.png)
 
 The while loop has a *condition* that evaluates to a [Boolean](/reference/types/boolean) value. After the `do` keyword, add the code that you want to run while the `condition` is `true`. The while loop concludes with `end while`.
 
@@ -27,11 +18,13 @@ The condition is tested before any code runs. Which means that if the condition
 
 The following example uses a while loop to make a diagonal line on the LED screen (points `0, 0`, `1, 1`, `2, 2`, `3, 3`, `4, 4`).
 
-// index is set to 4
-
-![](/static/mb/blocks/var-10.png)
-
-// subtract 1 from `index` each time through loop
+```blocks
+let index = 4;
+while(index >= 0) {
+    led.plot(index, index);
+    index--;
+}
+```
 
 ### Lessons
 
diff --git a/docs/reference/radio.md b/docs/reference/radio.md
index 27f23b08..36150d2c 100644
--- a/docs/reference/radio.md
+++ b/docs/reference/radio.md
@@ -16,5 +16,5 @@ radio.receivedSignalStrength();
 radio.setGroup(0);
 radio.setTransmitPower(0);
 radio.writeValueToSerial();
-radio.setTransmitSerialNumber(◊);
+radio.setTransmitSerialNumber(true);
 ```
diff --git a/docs/reference/serial.md b/docs/reference/serial.md
index e4a373d0..bf72fd14 100644
--- a/docs/reference/serial.md
+++ b/docs/reference/serial.md
@@ -3,6 +3,9 @@
 Reading and writing data over a serial connection.
 
 ```cards
-serial.writeValue(x, 0);
 serial.writeLine("");
+serial.writeNumber(0);
+serial.writeValue(x, 0);
+serial.writeString("");
+serial.readLine();
 ```
diff --git a/libs/microbit-radio/_locales/microbit-radio-strings.json b/libs/microbit-radio/_locales/microbit-radio-strings.json
index 11c6bc47..9c61d0d4 100644
--- a/libs/microbit-radio/_locales/microbit-radio-strings.json
+++ b/libs/microbit-radio/_locales/microbit-radio-strings.json
@@ -93,6 +93,9 @@
   "radio.setTransmitSerialNumber": "Set the radio to transmit the serial number in each message.",
   "radio.writeValueToSerial": "Reads a value sent with `stream value` and writes it\nto the serial stream as JSON",
   "serial": "Reading and writing data over a serial connection.",
+  "serial.readLine": "Reads a line of text from the serial port.",
   "serial.writeLine": "Prints a line of text to the serial",
+  "serial.writeNumber": "Prints a numeric value to the serial",
+  "serial.writeString": "Sends a piece of text through Serial connection.",
   "serial.writeValue": "Writes a ``name: value`` pair line to the serial."
 }
\ No newline at end of file