diff --git a/webgpu/lessons/webgpu-copying-data.md b/webgpu/lessons/webgpu-copying-data.md
index 93bf7583..67803bc8 100644
--- a/webgpu/lessons/webgpu-copying-data.md
+++ b/webgpu/lessons/webgpu-copying-data.md
@@ -239,7 +239,7 @@ encoder.copyTextureToBuffer(
 
 This has similar parameters to `copyBufferToTexture`
 just the texture (now the source) and the buffer (now the destination)
-are swapped. Like `copyTextureToBuffer`, `bytesPerRow` **must be
+are swapped. Like `copyBufferToTexture`, `bytesPerRow` **must be
 a multiple of 256!!**
 
 * `texture` must have a usage of `GPUTextureUsage.COPY_SRC`
@@ -255,7 +255,7 @@ must only differ by the suffix `'-srgb'`.
 signature:
 
 ```js
-encoder.copyTextureToBuffer(
+encoder.copyTextureToTexture(
   // details of the source texture
   src: { texture, mipLevel: 0, origin: [0, 0, 0], aspect: "all" },
 
diff --git a/webgpu/webgpu-vertex-buffers-index-buffer.html b/webgpu/webgpu-vertex-buffers-index-buffer.html
index 6928cfdf..cba2be44 100644
--- a/webgpu/webgpu-vertex-buffers-index-buffer.html
+++ b/webgpu/webgpu-vertex-buffers-index-buffer.html
@@ -66,9 +66,9 @@
 
   // 2 vertices per subdivision
   //
-  // 0  2  4  6  8 ...
-  //
   // 1  3  5  7  9 ...
+  //
+  // 0  2  4  6  8 ...
   for (let i = 0; i <= numSubdivisions; ++i) {
     const angle = startAngle + (i + 0) * (endAngle - startAngle) / numSubdivisions;