diff --git a/libs/microbit/helpers.ts b/libs/microbit/helpers.ts
new file mode 100644
index 00000000..1e6bad4a
--- /dev/null
+++ b/libs/microbit/helpers.ts
@@ -0,0 +1,6 @@
+namespace console {
+    export function log(msg: string) {
+        serial.writeString(msg);
+        serial.writeString("\r\n");
+    }
+}
diff --git a/libs/microbit/kind.json b/libs/microbit/kind.json
index b675ddda..5d0fbf1d 100644
--- a/libs/microbit/kind.json
+++ b/libs/microbit/kind.json
@@ -7,10 +7,11 @@
         "dal.d.ts",
         "enums.d.ts",
         "shims.d.ts",
-        "core.d.ts",
+        "ks-core.d.ts",
         "ksbit.h",
         "core.cpp",
-        "mbit.ts",
+        "ks-helpers.ts",
+        "helpers.ts",
         "images.cpp",
         "basic.cpp",
         "input.cpp",
diff --git a/libs/microbit/mbit.ts b/libs/microbit/mbit.ts
deleted file mode 100644
index c21980e5..00000000
--- a/libs/microbit/mbit.ts
+++ /dev/null
@@ -1,64 +0,0 @@
-type Action = () => void;
-
-namespace helpers {
-    export function arraySplice<T>(arr: T[], start: number, len: number) {
-        if (start < 0) {
-            return;
-        }
-        for (let i = 0; i < len; ++i) {
-            arr.removeAt(start)
-        }
-    }
-}
-
-namespace console {
-    export function log(msg: string) {
-        serial.writeString(msg);
-        serial.writeString("\r\n");
-    }
-}
-
-namespace Math {
-    export function clamp(min: number, max:number, value:number): number {
-        return Math.min(max, Math.max(min, value));
-    }
-
-    /**
-      * Returns the absolute value of a number (the value without regard to whether it is positive or negative). 
-      * For example, the absolute value of -5 is the same as the absolute value of 5.
-      * @param x A numeric expression for which the absolute value is needed.
-      */
-    export function abs(x: number): number
-    {
-        return x < 0 ? -x : x;
-    }
-    
-    /**
-      * Returns the sign of the x, indicating whether x is positive, negative or zero.
-      * @param x The numeric expression to test
-      */
-    export function sign(x: number): number
-    {
-        if (x == 0) return 0;
-        if (x > 0) return 1;
-        return -1;
-    }
-    
-    /**
-      * Returns the larger of two supplied numeric expressions. 
-      */
-    export function max(a:number, b:number): number
-    {
-        if (a >= b) return a;
-        return b;
-    }
-    
-    /**
-      * Returns the smaller of two supplied numeric expressions. 
-      */
-    export function min(a:number, b:number): number
-    {
-        if (a <= b) return a;
-        return b;
-    }
-}