Preventing weed growth on soil wall/slope

Can you put a barrier/ wall vertically say scaffold planks?

Thanks, JJB. I have paving slabs and had considered leaning them against the side, but worry about my kids getting squashed by them. Your suggestion of a wall out of something less treacherous also makes me think of lining up some planters/creating a raised bed down the side. Then I would block out the growing area for the weeds ( if I build up high enough) and have a much easier to maintain growing area. I will convince my husband of the wisdom of this plan and the related expense!