Teach Starter's PowerPoint templates are ready-made with brilliant designs embedded in the slide show. If you would like to add a completely blank slide, follow these steps:
Step 1: Click 'View'
Step 2: Click 'Slide Master'
Step 3: Click 'Insert Slide Master'
Step 4: Click 'Close Master View'
Step 5: Select the slide you would like to change the style, then click 'layout' and select the new blank designs. Alternatively, add a new slide that uses your new styles.