Practice!
Practice at least 3 of the exercises on the right.
Plan B: if the links above don't work, go to IL --> Sources --> Speaking --> Pronunciation --> Audio Practice --> TH + click the sounds you want to practice.
USE YOUR EARPHONES. Make sure you open the video information too so you can read along with the sentences and read out loud after the tone.
IMPORTANT!
You have to open the link in a new tab (not in the Outlook app), because you need to see the sentences below the video in order to repeat them (klik onderaan het filmpje bij de 'info' op 'meer weergeven')