diff --git a/docs/Instruction/week03.md b/docs/Instruction/week03.md
index e5becbfa417df828245c6d2e450cb39b0b8bf392..5452f3ea9f82dd66d2c346808b6217a724015f1a 100644
--- a/docs/Instruction/week03.md
+++ b/docs/Instruction/week03.md
@@ -151,7 +151,7 @@ Xtensa|ESP8266</br>ESP32|Serial    |USB-Serial board
 ### SAMD11C programming environment
 
   - Use any PC and Commercial DAP to program your SAMD11C board
-  - Use Raspberry Pi3 (Rspberry Pi OS) as OpenOCD to program SAMD11C  
+  - Use Raspberry Pi3 (Raspberry Pi OS) as OpenOCD to program SAMD11C  
   - Use Raspberry Pi4 (Ubuntu) and Seeeduino Xiao as DAPLink to program SAMD11C  
 
 ### Preparation