Here are two websites that will help you liven up and engage your students in your white board lessons.
Heathers animations has thousands of free animations in many categories that you can add to your presentations.
On-line-stopwatch.com has classroom timers and clocks for those activities where you have a time limit.
Here is a power point That I created for my grade 7 students with a theme of simple present tense. All resources are in Microsoft power point and are fully editable.
Present Simple Tence power point
This is a power point that I created for my grade 7 students. It has a theme of past simple.
Unit 4 Power Point Making Friends
This is a power point that I created for my grade 7 students with a theme of present continuous.
Matthayom 1 Unit 2