Strengthen skills
The Strengthen skills (or practice) button provides a number [1] of  exercises reviewing material learned in lessons, with a focus on the material that Duolingo believes the user most needs practice in at that moment[2]. Such practices are untimed by default, however a timed practice option is also available for purchase in the Lingot store. Untimed tests always earn the user a minimum of 3XP, and a maximum of 10XP.

How it worksEdit


Prompt to choose between timed and untimed practice

A practice session may result in strengthening the words practiced[3], and if enough words from the same skill are strengthened, also strengthening one or more related skills[4]. So "it is very possible that practicing one skill can strengthen another skill"[5]. A session doesn't necessarily need to be completed successfully in order to strengthen skills, especially if one uses a timed practice [6]. However, it may take more than one try to fully strengthen a skill (e.g. make it gold)[7]

Best practicesEdit

According to Duolingo, "learners should first focus on finishing all the lessons in a skill, and later come back to review them at just the right times"[8].


Strengthen skills helps users to:

  • Memorize;
  • Test their knowledge;
  • Review learnt material; and 
  • Maintain and improve their skills.

Notes Edit

Global strengthen skills shows a message and doesn't allow more practice when [9]:

Algorithm thinks your words are all fresh.

See alsoEdit


  5. "Strengthening a different skill?",$comment_id=4591518
  6. "Notice some changes in word strength?",